FOOD CHEMISTRY
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2024
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IF 8.5
Kuiyou Wang,Kexin Huang,Xueqian Li,Hao Wu,Li Wang,Fengyu Bai,Mingqian Tan,Wentao Su
This study innovatively utilized kelp-derived nanocellulose and sodium caseinate (SC) to prepare fucoxanthin (Fx)-loaded nanoparticles, exploring their efficacy in reducing oxidative stress and inhibiting lipid accumulation. 2, 2, 6, 6-Tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation produced well-dispersed, kelp-derived nanocellulose. When these celluloses were mixed with SC at varying mass ratios, the composite nanoparticles showed excellent stability. Specifically, at a TEMPO-oxidized kelp nanocellulose (TKNC) to SC mass ratio of 1:3, the encapsulation efficiency for Fx reached 82.2 %, with a retention of 56.12 % after 14 days of storage. In vitro , the nanoparticles demonstrated good biocompatibility and were efficiently absorbed by cells, significantly enhancing Fx bioavailability . This enhanced delivery efficiency alleviates oxidative stress by activating the Nrf2/HO-1/NQO1 signaling pathways and effectively inhibits lipid droplet formation induced by excessive free fatty acids (FFAs). Moreover, distribution studies in mice revealed effective accumulation of nanoparticles in the intestines and liver, indicating their potential for targeted drug delivery. These findings provide strong experimental support for the use of TKNC and SC as biocompatible materials in nanoparticles for drug delivery and treatment applications.
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CELLULOSE
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2024
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IF 4.9
Zhang Hao,Chen Junfeng,Wang Yanan,Zhang Ying,Dou Huicheng,Zhong Hao,Guo Minghui
Wood-based laminated composites with excellent strength and toughness have attracted much attention, but it is a challenge to process fast-growing natural poplar wood with poor mechanical properties into high-performance laminated composites without the use of adhesives. In this study, natural poplar wood was delignified and TEMPO-oxidized by a “top-down” strategy to obtain a wood scaffold with a cellulose content of up to 98%, which was then used as a substrate and impregnated with Ca 2+ and PVA to form a large number of hydrogen and ionic bonds within the wood. Finally, under the action of hot pressing, laminated composites with high tensile strength (237 MPa), flexural strength (246 MPa) and impact toughness (50.45 KJ/m 2 ) were obtained, which also displayed excellent thermal stability and water resistance. This work demonstrates that the utilization of renewable fast-growing poplar wood as a substrate and glue-free bonding method can produce low-cost, sustainable and high-performance wood-based laminated composites.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yanduo Zhai,Yande Cui,Meng Zhou,Pan Chen,Chunyu Chang,Jinghua Chen
Nanocellulose is a promising candidate for fabricating high-performance cellulosic materials due to its extremely fine structure and excellent mechanical properties. However, converting the extraordinary properties of individual nanofibers to macroscopic fibers through large-scale preparation remains a challenge. Inspired by the staple spun yarns, herein, we demonstrate a facile and scalable strategy for continuously additive fabrication of nanocellulose yarns by twisting stacked short nanocellulose slivers. Benefiting from the wet-stretching and twisting process, the resultant yarns with tightly intertwined cellulose nanofibers (CNFs) exhibit outstanding toughness (42.9MJ m -3 ) and fracture strain (20 %), respectively. Importantly, this approach can be extended to develop functional yarns such as fluorescent yarns, magnetic yarns, and conductive yarns. This work provides a new method for large-scale preparation of tough nanocellulose yarns for future functional materials, such as smart textiles and wearable electronics.
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Molecular Catalysis
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2024
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IF 3.9
Zong-Pin Fu,Le-Le Qiu,Yun-Peng Zhao,Fa-Peng Wu,Jin-Xuan Xie,Jian Xiao,Jing Liang,Jian Li,Fang-Jing Liu,Jing-Pei Cao
Hydrogenolysis of lignin to produce valuable aromatic chemicals under mild conditions can effectively realize the value-added utilization of lignin. In this work, catalytic transfer hydrogenolysis (CTH) of dealkaline lignin (DL) over Ni 0.5 Co 1.5 Al catalyst was studied for the production of phenolic compounds, and the reaction mechanism was elucidated through the reaction of 2-phenoxy-1-phenylethanol (PPE) in deuterated isopropanol (CD 3 CD( OD )CD 3 ) and D 2 . Moreover, we investigated the CTH behaviors of various lignin including organic solvents lignin in birch (OL), acidic solvents lignin in birch (AL) and birch powder (BW) to explore the suitability of the Ni 0.5 Co 1.5 Al catalyst. The results showed that Ni 0.5 Co 1.5 Al was able to catalyze the hydrogenolysis of various lignin into phenolic monomers using isopropanol as an in-situ hydrogen source. Under optimized conditions, the hydrogenolysis of DL over Ni 0.5 Co 1.5 Al achieved 43.30 wt% lignin oil yield. The experimental results of isotope labeling experiments exhibited that the active hydrogen generated by isopropanol is used for the cleavage of C-O bonds, and the electronic interactions between Ni and Co promotes the C-O bonds breaking. Isopropanol can not only be a hydrogen donor, but also act as a reaction solvent to stabilize intermediates and enhance the yield of phenolic compounds in the lignin CTH process.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Qiyue Zhao,Hong-Man Hou,Gong-Liang Zhang,Hongshun Hao,Bei-wei Zhu,Jingran Bi
Heterocyclic aromatic amines (HAAs) are the main carcinogens produced during thermal processing of protein-rich foods. In this paper, a composite aerogel (TOCNF Ca ) with a stabilized dual-network structure was prepared via a template for the in-situ synthesis of UiO-66 on cellulose for the adsorption of HAAs in food. The dual-network structure of TOCNF Ca provides the composite aerogel with excellent wet strength , maintaining excellent compressive properties. With the in-situ grown UiO-66 content up to 71.89 wt%, the hierarchical porosity endowed TOCNF Ca @UiO-66 with the ability to rapidly adsorb HAAs molecules with high capacity (1.44–5.82 μmol/g). Based on excellent thermal stability , adsorption capacity and anti-interference, TOCNF Ca @UiO-66 achieved satisfactory recoveries of HAAs in the boiled marinade, which is faster and more economical than the conventional SPE method. Moreover, TOCNF Ca @UiO-66 could maintain 84.55 % of the initial adsorption capacity after 5 times of reuse.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jun Wan,Yang-Ai Ma,Yina Nie,Junhao Cheng,Chengming Wang,Lin Liu,Feng Fu
Photocatalytic selective aerobic oxidation in organic synthesis is a green and sustainable approach to producing valuable chemicals. However, the sluggish charge dynamics and limited active sites for O 2 activation tremendously hinder catalytic activity. Herein, we address these challenges by developing a novel polarization photocatalyst composed of atomically dispersed Ni sites with S-doped Bi 4 O 5 BrI (Ni/Bi 4 O 5 BrI-S), which demonstrates bulk-surface charge polarization and active site manipulation. Specifically, this bulk-surface charge polarization, resulting from a cascade of the bulk electric field (BEF) and local surface electric field (LSEF), induces efficient separation of bulk and surface charge carriers. Moreover, the atomically dispersed Ni sites substantially augment active sites for O 2 activation, further accelerating charge transfer and increasing the generation of photogenerated holes (h + ) and superoxide radical (•O 2 − ) active species for triggering efficient aerobic oxidation of sulfide. This study presents a collaborative strategy for manipulating charge behavior with potential applications in renewable energy and green chemistry.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Yipeng Chen,Jiayi Zhang,Zirui Zhuang,Jinghan Zhou,Yang Peng,Baokang Dang,Qingfeng Sun
Effectively regulating heat flow between buildings and their environment, through the use of infrared property-structural materials that passively regulate radiative heat dissipation, not only enhances thermal comfort but also offers a potentially cost-effective solution for energy conservation and countering global warming. However, fulfilling the demand for aesthetic appearance and effective display in real-life situations while maintaining infrared properties remains a significant impediment to the commercialization of structural materials. In this work, we utilized ion-dyed cellulose as the base material and employed gel-assisted and thermal pressing methods to produce ion-dyed cooling cellulose bulk. Experimental results demonstrate its bending strength reaching 111 MPa, and impact toughness reaching 79.8 kJ m −2 . While offering a wide range of colors, it exhibits excellent radiative cooling performance. During days with strong solar radiation, three different colors of ion-dyed cooling cellulose bulk achieve temperature reductions of 2.2–3.9 °C. Moreover, the fabrication process is simple, cost-effective, and conducive to industrialization. This study provides a practical and theoretical foundation for the development and design of colored wood-based radiative cooling materials.
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CHINESE JOURNAL OF CATALYSIS
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2024
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IF 15.7
Junlei Zhang,Wencong Liu,Biao Liu,Xiaoguang Duan,Zhimin Ao,Mingshan Zhu
ABSTRACT Single-atom catalysts (SACs) as a new class of peroxymonosulfate (PMS) activator are still limited by the low metal loading and activity. Here, we introduce a new strategy of interfacial coupling SACs with metal oxides to fine-tune the active single-atom sites and improve the atomic utilization efficiency. Taking Co 3 O 4 @Co 1 /C 3 N 5 as a case, the formation of heterostructures enhanced the activity of outer-sphere SACs for PMS activation , further upgrading the kinetics of diclofenac sodium degradation. The degradation rate of the composite increases by up to approximately 28.0 and 2.5 times compared to Co 3 O 4 and Co 1 /C 3 N 5 , respectively. The Co 1 –O (Co 3 O 4 ) and Co–N (Co 1 /C 3 N 5 ) bonds between Co 1 /C 3 N 5 and Co 3 O 4 make a tightly coupled interface for charge migration, which synergically optimizes the PMS adsorption configuration toward reactive species generation with lower activation energy . Co 3 O 4 @Co 1 /C 3 N 5 also exhibits excellent reusability and can be employed in broad application scenarios.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yuhang Yang,Xinwang Cao,Jinyou Lin
Air pollution such as particulate matter is always a serious threat to public health, thus many disposable and degradable air filters were designed to deal with this severe challenge avoiding the secondary pollution after discarding. Herein, inspired by the natural spider web structure, a hierarchical porous composite fibrous membrane containing web-like cellulose nanofibrils (CNF) was developed. The implanted porous CNF membranes with web-like among the inter-fiber voids of electrospun poly(ethylene- co -viny alcohol) fibrous membrane were realized via a layer-by-layer (LBL) method followed by an elevated-temperature drying, which exhibit a smaller diameter with one or two orders of magnitude reduction comparing with the substrate fibers. The morphology of implanted CNF membranes can be regulated by changing the CNF dispersion concentration, PH, solution composition as well as the LBL times. The addition of a small amount of isopropyl alcohol to the CNF solution can efficiently facilitate the implantation of web-like CNF on substrate, resulting in both improvements on the mechanical properties and filtration capacity. The result shows that the implanted web-like CNF of as-prepared composite membrane can enhance the PM 0.3 capture ability (reaching 96.8 %) while not surge its pressure drop (225.7 Pa) exceeding N95 standard. This work presents a new design and fabrication of CNF-based filter materials directly without using freeze drying, which can not only provide a fully or partially biodegradable air filter but also give encouragement to explore new filters efficiently.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yang Yang,Yuxin Chen,Yiqin Li,Chenrui Hao,Zhaoping Song,Peng Lu,Zhiwei Wang
Nanocellulose has attracted extensive attention in the preparation of thermal insulation materials because of its high Young's modulus, high strength and low thermal expansion coefficient. In this study, nanocellulose microgels prepared by self-assembly of 2,2,6,6-Tetramethylpiperidoxyl oxidized nanocellulose (TOCNC) and Nisin were used as particle stabilizers, and acrylated epoxidized soybean oil (AESO) was used as oil phase to prepare Pickering emulsion, which was cured by heating to obtain biomass-based Pickering thermal insulation foam. Pickering foams prepared based on microgels with different Nisin contents have significant differences in thermal insulation performance. The results show that the addition of microgel particles can improve the thermal stability, increase the roughness of pore wall and reduce the thermal conductivity of AESO polymer foam. Among them, the Pickering foam prepared by microgel containing 0.06 wt% Nisin has the best thermal insulation performance and rougher pore wall surface, and its thermal conductivity is 0.040 W/(m·K), which is obviously lower than that of the foam prepared by TOCNC (0.083 W/(m·K)). Based on the structural design of nanocellulose microgel particles, this work innovatively realized the assembly of microgels at the oil-water interface and the regulation of thermal insulation performance through Pickering technology, and developed a biomass-based foam with improved thermal insulation effect, which provides a new idea for expanding the advanced application of nanocellulose in the field of thermal insulation materials.
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JOURNAL OF FLUORESCENCE
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2024
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IF 2.6
Yu Shujuan,Hou Ruiliang,Sun Jiaxiang,Deng Cailong,Tan Dengfeng,Shi Hongqi
Preparing a biomass adsorbent material with high-absorption performance but low cost plays a vital role in wastewater treatment. In this study, a novel nitrogen-doped sisal fiber-based carbon dots (SF-N-CDs) composite was prepared by directly growing carbon dots (CDs) on sisal fiber (SF) using a microwave method with polyethyleneimine (PEI) as a raw material. The prepared SF-N-CDs were characterized using FTIR, XRD, Contact angle(CA), TGA, XPS, and SEM. The results revealed that the CDs were successfully grown on SF. The adsorption properties of SF-N-CDs were significantly enhanced when they adsorbed methyl blue (MeB) dye. Specifically, the adsorption of MeB by SF-N-CDs was up to 619.7 mg/g, which was about 2.6 times higher than that of raw SF. This implied that the introduction of CDs increases the adsorption site, thus enhancing the adsorption capacity. Analysis on kinetics and thermodynamics of MeB adsorption by SF-N-CDs revealed that the adsorption process followed the Langmuir isotherm model and were consistent with both kinetic models. It signifies that the adsorption involves both physical and chemical adsorption processes. Further, the SF-N-CDs maintained a removal rate of 70.9% after six adsorption-regeneration cycles, demonstrating good regeneration performance. Moreover, the SF-N-CDs could selectively separate MeB from a mixture of rhodamine B and saffron T. Consequently, the findings of this study suggest that SF-N-CDs are promising adsorbents for anionic dyes.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Hao Wang,Renting Huang,Wei Mao,Hao Xu,Chutong Ling,Junru Zhao,Fan Yi,Yongxin Zhou,Jinghong Zhou
Iron-based metal-organic frameworks (MOFs) represent a potentially important tool for controlling organic pollutants . However, the structural stability of most iron-based MOFs in the aqueous environment is limited. Therefore, this study sought to improve the aqueous stability and photocatalytic activity of MIL-101(Fe) using an in-situ modification strategy. A novel and highly water-stable MIL-101(Fe)@IPA 4 was prepared using ligand regulation. Owing to the in-situ modification effect, MIL-101(Fe)@IPA 4 exhibited remarkable hydrophobicity with a water contact angle at 102.4° while maintaining minimal leaching of iron ions (0.46 mg/L), even after five cycles of photocatalysis . Under MIL-101(Fe)@IPA 4 /UV/H 2 O 2 conditions, the removal rates of ciprofloxacin and total organic carbon reached 100% and 49.16%, respectively, within 60 min. These researches suggest that introducing IPA improves the light absorption properties of MIL-101(Fe)@IPA 4 and facilitates electron-hole separation, thereby promoting the generation of active species. The ecotoxicity assessment of major degradation intermediates of ciprofloxacin was conducted using the ECOSAR system. Our findings provide novel insights for enhancing the water stability of iron-based MOFs through an in-situ modification strategy, which is crucial for pollution control efforts.
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